Capacity of human operational thinking

According to ergonomics, the amount of RAM does not exceed 5 – 7 objects (in exceptional cases – 9 objects). Therefore, a regular keyboard with a number of keys of about 30 creates deep psychological discomfort. This can be assured by paying attention to the irregularity of the time intervals between keystrokes. Imagine a heart that is beating so unevenly. This is a very complicated arrhythmia. And in such an arrhythmia, the user’s brain works. But the way out is a new positive keyboard.